Regulating means.



W. E. HUDELSON.

REGULATING MEANS.

APPLICATION FILED FEB- 5. I917.

Patented Oct. 8, 1918.

INVENTOH MIMI ATTORNEY STATES Y WARREN E. HUDEI SON, OF SAN JOSE, CALIFORNIA.

BEG-HEATING MEANS,

ulating Means, of which the following is a specification.

This inventlon relates to regulatmg means,

and more particularly to means for re lating the water and steam pressure 0 a steam boiler.

One of the main objects of the invention is to provide regulating means of simple construction and operation which may be applied to a boiler ofstandard construction for automatically regulating the water level within the boiler. I

A further object is to provide means for controlling the supply of fuel to the boiler in accordance with the steam pressure. of the boiler, thus providing simple and efficient controlling means for regulating the pressure of the steam.

Further-objects will appear from the detail descri tion.

In the rawings:

Figure 1 is a vertical longitudinal sectional view through a conventional form of boiler with the regulating device applied,

Fig. 2 is a central vertical sectional view taklen through the wa'er regulating device, an

Fig. 3 is a similar View taken through the fuel su ply regulating means.

The oiler 1 is provided with the front plate 2 spaced from the head 3 and the back plate 4. A bottom plate 5 is secured to the front and back plates, above the bottom 6 of the boiler, and extends to the rear head 7 of the boiler. A plurality of spaced firetubes-8 are suspended in the plates 2 and 4:, and communicate with the smoke-box 9 at the front of the boiler between the head 3 and plate 2 and the Smokestack 10 at the rear of the boiler between the head 7 and platef l. A. fuel supply nozzle 11 extends into the fire-box between the plate 5 and bottom 6 of the boiler. This nozzle communicates at its outer end with a cylindrical valve-casing 12 in which is slidably mounted a cylindrical head 13 on-which rests the lower end of a piston rod 14 carried by a piston 15 operative in a cylinder 16. This Specification of Letters Patent.

means of a pipe'17. By this means the steam which is generated in the boiler and accumulates in the upper portion thereof has direct access to the cylinder 16 above piston 15 so as to exert pressure on'the upper surface thereof for' the purpose of opcrating the piston. An expansion collsprmg 18 is mounted about piston rod 14 and is confined between the piston 15 and a collar 19 threaded on the upper portionof casing 12. This spring acts to normally a hold the piston' 15 raised and to maintain the head 13 in operative position. The head 13 is provided with an upper diametrically extending bore 13 and a lower bore 13". When the head is in operative position, bore 13 is in register with an oil supply-pipe '20, which is connected to a tank or other suitable source of supply of fuel oil, and the bore 13 is in reglster with a pipe 21 connected to a suitable source of sup 1y of pressure fluid, this fluid being taken rom a tank or directly from the steam-chamber of the boiler 1, as desired. Whenthe head is in operative position, the fuel is projected into the fire-box where it is i through the fire-tubes to the Smokestack. When the steam pressure in the boiler rises above a predetermined amount, the pressure exerted on the upper face of piston 15 will overcome the upward pressure of expansioncompletely, to'the nozzle 11. By this means the heat generated within the boiler is automatically reduced so as to reduce the amount of steam generated, and consequently the Patented Oct. 8, 1918.

Application filed February 5, 1917. Serial No. 146,772.

ited in the usual manner, the products 0 combustlon flowing beneath the water-chamber and off the supply of fuel, either partially or steam pressure within the boiler. When the steam within the boiler has been reduced to the desired predetermined pressure, the piston 15 is returned to its initial position by the action'of expansion spring 18, thus permitting the full amount of fuel to be sup plied to the nozzle so that the n'ormal quantityof steam will be generated; Normally, the fuel supply will not be com letely cut off, so that the fire within the oiler will notbe entirely extinguished. However, if

desired, a suitable igniting means, such as a pilot light may be provided within the fire-chamber so as to insure that, when the supply of fuel is renewed, it will be properly ignited. This is not deemed necessary, however, under ordinary conditions.

A cylinder 22 is mounted in front of the boiler and is connected by a pipe 23 to the water-chamber, the outer end of this pipe being connected to the cylinder adjacent the lower end thereof. A hollow cylindrical float 24, which is closed at its lower end,

is mountedwithin cylinder 22. A rod 25 is secured to the upper end of this float,at

' the center thereof. This rod extends through lllii a depending cylindrical packing-casing 26 at the top of cylinder 22, which is interiorly threaded to receive a packing-nut 27 A small cylinder 28 is secured on top of cylinder 22- and is provided, at the center of the top with a depending interiorly threaded sleeve 29. This sleeve receives an valve 31 is provided with a diametrically extending bore 35. When the valve is lowered this bore registers with the bores of the pipes 33 and 34, so as topermit water to be supplied to the boiler.-

Normally, the float 24 is held in depressed position by means of an expansion spring 36 which is mounted about the rod 25 and is confined between a collar 37 secured on the rod and the lower end of sleeve 30. By means of sleeve 30 the amount of compression of spring 36 ma be varied so as to adjust the expansive orce of the spring to.

. suit circumstances. As the water from the boiler flows into the cylinder 22, it raises the float 24, against the action of the expansion-spring 36. This will raise the valve 31 into the casing 32 so as to close communication between pipes 33 and 34 and shut 0d the supply of water to the boiler. By ad justing the spring 36, the valve 31 may be caused to operate in such manner as to maintain the water at any desired constant level within the boiler. 4

The head or valve 13 is held raised so as to bear against the rounded lower end of rod-14 by means of a coil expansion spring This spring is confined between the valve and a disk 42 slidable in casing 12. An adjusting screw 43 is threaded through the lower end of the casing, at the center thereof, and engages the disk. By this means eeann the compression of spring 41 may be varied to suit circumstances.

To prevent rotary movement of the fuel supply control valve or head 13, a set screw 38 is threaded through casing 12 and engages into a groove 39 in the head. Diametrically opposite to, and above set screw 38, a second set screw 40 is threaded through casing 12 so as to extend into the same. This set screw 40 is so positioned as to engage the upper end of head 13 so as to positively limit upward movement thereof when the head is raised into its highest position. By this means vT insure that, when the pressure in the boiler has fallen to the predetermined minimum, the valve 13 will be in such position as to supply the maximum amount of fuel to the furnace. This will be true even though the pressure in the boiler falls below the predeterminedminimum and the piston15 is raised higher than the position shown in Fig. 3 of the drawings, due to the fact that valve 13 is separate from pistonrod 14.

To permit adjustment of spring 18, the lower portion of cylinder 16 is provided with a plurality of spaced longitudinal slots, as in Figs. 1 and 3 of the drawings. This permits ready access to the adjusting collar 19 whereby it may be quickly and easily adjusted oncasing 12 thus varying the compression of spring 18. As will be noted, these slots are of such length as to avoid interference with the proper operation of piston 15. j

The valve 31 for controlling the water supply is secured against rotary movement by a set screw 44 which engages into a longitlrdinally extending :groove in the head. This insures that bore 35 of the valve will be brought into proper register with the 'ipes 33 and 34 when the valve is in its owest position.

By providing a boiler with feed water regulating means and steam pressure regulating means, such as shownanddescribed, an automatic control of the boiler is established which acts to insure that the steam ressure and the water level will be maintained at. the desired predetermined level or pressure. It will be evident that the regulating means shown and described may be equally well applied to any boiler of any standard construction other than that disclosed herein. Of course, in applying my regulating means to different types of boilers there may be slight changes made in the construction and arrangement of the various parts of the invention, which will fall within the field and scope of the claimand it is 126 The combination wlth a boiler having a 130 fire chamber, of a fuel supply nozzle communicating with said chamber, a cylinder communicating at its upper end with the steam space of said boiler, the lower portion of said cylinder being provided with a lurality of radially disposed longitudina ly extending slots, a valve casing secured in the lower end of the cylinder, the upper portion of said casing projecting into said cylinder, an adjusting nut threaded on the upper portion of the valve casing within the cylinder, a valve operative inv said casing and interposed between said fuel nozzle and supply pipe so as to control the flow of fuel to said nozzle, said Valve having limited upward movement, a dependin rod carried by said piston, the lower end 0 said rod resting upon the upper face of the valve a coil expansion spring mounted about sai piston rod and confined between the piston 20 WARREN E. HUDELSON.

Witnesses: I W. FLOYD HENRY, LEO J. RAMER. 

